2D geometric model

{{Short description|2-dimensional model of an object}}

A 2D geometric model is a geometric model of an object as a two-dimensional figure, usually on the Euclidean or Cartesian plane.

Even though all material objects are three-dimensional, a 2D geometric model is often adequate for certain flat objects, such as paper cut-outs and machine parts made of sheet metal. Other examples include circles used as a model of thunderstorms, which can be considered flat when viewed from above.{{cite journal |last1 = Nissen |first1 = Silas Boye |last2 = Haerter| first2 = Jan O.|title=Circling in on Convective Self-Aggregation |journal=Journal of Geophysical Research: Atmospheres |date=September 24, 2021 |volume=126 |issue = 20 |doi=10.1029/2021JD035331 |arxiv=1911.12849 |bibcode = 2021JGRD..12635331N |s2cid = 244074835 }}

2D geometric models are also convenient for describing certain types of artificial images, such as technical diagrams, logos, the glyphs of a font, etc. They are an essential tool of 2D computer graphics and often used as components of 3D geometric models, e.g. to describe the decals to be applied to a car model. Modern architecture practice "digital rendering" which is a technique used to form a perception of a 2-D geometric model as of a 3-D geometric model designed through descriptive geometry and computerized equipment.{{Cite journal |doi = 10.1163/156856807780421165|pmid = 17524256|year = 2007|issue = 3|pages = 219–64|volume = 20|last1 = Dresp|first1 = Birgitta|title = Which geometric model for the curvature of 2-D shape contours?|journal = Spatial Vision|last2 = Silvestri|first2 = Chiara|last3 = Motro|first3 = René|s2cid = 35702710}}